why is it so hard to do research w real data? short answer: there hasn't been any since 1995 long answer: there's way too much data floating around disadvantage: inappropriate data can be distracting or worse advantage: publishing inappropriate data can incent people to offer you better data (`desperate times call for desperate measures' methodology) 2 outstanding talks about problems w Internet data vern's talk aug2001 www.icir.org/vern/talks/vp-nrdm01.ps.gz david's talk apr2002 www.caida.org/publications/presentations/